Method and apparatus for dry forming webs of pulp from vegetable fibrous material
Abstract
Abstract THIN INVENTION RELATES TO A METHOD AND AN APPARATUS FOR CONTINUOUS DRY-FORMING A WEB OR BAT OF PULP FROM VEGETABLE FIBROUS MATERIAL ON AN ENDLESS WIRE SCREEN BY INTRODUNG INTO A FORMING CHAMBER OPENING TOWARDS SAID WIRE SCREEN A DISPERSION OF FIBERS IN A GAS AND SIMULTANEOUSLY CREATING ON THE REAR SIDE OF SAID WIRE SCREEN OPPOSITE TO SAID FORMING CHAMBER SO MUCH REDUCED PRESSURE THAT MORE GAS IS SUCKED THROUGH THE WIRE SCREEN THAN IS APPLIED WITH THE VEHICLE GAS IN THE DISPERSION OF FIBERS IN GAS, THE ADDITIONAL GAS BEING INTRODUCED BETWEEN SAID WIRE SCREEN AND THE LOWERMOST PORTION OF THE FORMING CHAMBER, AND BY RECIRCULATING THE WITHDRAWN GAS THROUGH A CONDUIT SYSTEM TO THE FEED SIDE OF THE FORMING CHAMBER TOGETHER WITH NEW FIBROUS MATERIAL. THE ADDITIONAL GAS IS WITHDRAWN FROM THE CONDIUT SYSTEM TO AVOID INTRODUCTION OF ATMOSPHERIC AIR.
Inventors
- 👤 Rolf Bertil Reinhall
- 👤 Karl Nicolaus Cederquist
Bibliographic Details
Claims Analysis
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